Working with promises inside an if/else

Question

I have a conditional statement in which I need to perform one of two operations, then continue after whichever operation has resolved. So my code currently looks as follows:

Answer 1

more_code = miFunc() => return new Promise((resolve, reject) => ... });

Solution 1

const waitFor = should_do_thing_a ? do_thing_a() : do_thing_b();
waitFor.then(...).catch(...)

Solution 2

let waitFor = Promise.resolve();

if (do_thing_a) {
    waitFor = do_thing_a();
} else {
    waitFor = do_thing_b();
}

waitFor.then(...).catch(...);